Here the lastest rumors posted on ScreamScape:
(4/8/11) According to a report at the LA Times, Universal has been conducting some guest surveys about a possible expansion of the Wizarding World of Harry Potter that could double the size of the entire land. Apparently the phase, "twice as big with twice as much everything." was used. From the report and rumors I've heard myself, the inclusion of Diagon Alley and a Leaky Cauldron restaurant are a virtual lock in at this point. Unfortunately, no new rumors about a possible dark roller coaster ride, but give it time...
(1/31/11) While the rumor mill about what may or may not be in the Wizarding World of Harry Potter expansion site is just starting to ramp up, Behind the Thrills has posted a poll to allow their readers to vote on what things you would like to see added.
(1/29/11) According to one rumor, Universal is looking into having the expansion of the Wizarding World of Harry Potter finished by 2013
which is confidently the same time that Disney should be done with their Fantasyland expansion down the road. (I love it when they play nasty
)
As for the expansion, the plans are still being worked on, but the general idea is to take over the rest of Lost Continent, though at the same time they do not want to disturb the Mythos restaurant. (Just my 2 cents
but just place the new gateway to the Wizarding World just beyond the entrance of Mythos to avoid the clash.) The obvious and early idea here right now is to re-create a Diagon Alley environment
full of more theme appropriate shops to sell merchandise of course. An action show of some kind is being tossed around to replace Sinbad, and one possible storyline could involve the TriWizard Tournament. As for what may become of Poseidons Fury
the jury is still out, and many ideas are said to be on the table, however one possible idea under consideration would be an indoor steel coaster ride themed to Gringotts Wizarding Bank vaults seen in the first film. In case youve forgotten, check out the video embedded below.